Hi,
Recently, I've encountered the following phrase:
"To this day I'm proud of..."
It is one of the phrases that can be used while recounting a past event, e.g. what I was doing when the first man landed on the moon and I saw it on TV.
However there was no context available, it was only an examplary phrase and it even wasn't finished. I don't understand it at all. What can it mean? What day does "this day" refer to? Today or that day from the past?
To this day, I remember what I was doing when the first man landed on the moon. This means I have remembered from the day man landed on the moon until this day, ie now, the day that I am speaking.
You might also like to consider the similar expression, 'From that day to this, I have remembered . . . '.
Best wishes, Clive